CN115013097A - Large unit peak shaving system capable of flexibly performing peak shaving operation and operation mode - Google Patents
Large unit peak shaving system capable of flexibly performing peak shaving operation and operation mode Download PDFInfo
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- CN115013097A CN115013097A CN202210589438.2A CN202210589438A CN115013097A CN 115013097 A CN115013097 A CN 115013097A CN 202210589438 A CN202210589438 A CN 202210589438A CN 115013097 A CN115013097 A CN 115013097A
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- 230000005611 electricity Effects 0.000 claims description 6
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- 238000003303 reheating Methods 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000011017 operating method Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
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- 230000001276 controlling effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The invention discloses a large unit peak shaving system capable of flexibly operating in peak shaving and an operating method thereof, the system comprises a boiler and at least two groups of turbines, a main steam main pipe, a low-temperature reheat steam main pipe and a high-temperature reheat steam main pipe are connected between the boiler and the turbines, each group of turbines comprises a high-pressure cylinder, the high-temperature reheating steam turbine set comprises medium-pressure cylinders and low-pressure cylinders, wherein a high-pressure cylinder regulating valve is arranged on a steam inlet of each high-pressure cylinder, each high-pressure cylinder is connected with a main steam pipe through the high-pressure cylinder regulating valve, a steam outlet of each high-pressure cylinder is connected with a low-temperature reheating steam main pipe, a medium-pressure cylinder regulating valve is arranged on a steam inlet of each medium-pressure cylinder, each medium-pressure cylinder is connected with a high-temperature reheating steam main pipe through the medium-pressure cylinder regulating valve, and the method realizes that the deep peak regulation of a single steam turbine set is less than 20% by adopting a double-stage regulating method and a single-stage regulating method, obtains the peak regulation benefit and has high value.
Description
Technical Field
The invention belongs to the technical field of thermal power generation, and particularly relates to a large unit peak shaving system capable of flexibly performing peak shaving operation and an operation method.
Background
Along with the improvement of national economy and the improvement of the living standard of people, the heating demand of residents is stronger and stronger, the efficient utilization of energy is more and more concerned by people, and the problem that people have to face is how to effectively balance the electric load and the heat load of a unit and meet the peak regulation requirement of a power grid.
Disclosure of Invention
In order to solve the technical problems, the invention provides a large unit peak shaving system capable of flexibly performing peak shaving operation and an operation method
The specific scheme is as follows:
the utility model provides a big unit peak shaving system that can adjust peak operation in a flexible way, including boiler and at least two sets of steam turbines, the superheater exit linkage of boiler has the female pipe of main steam, the female pipe of reheater access connection low temperature reheat steam of boiler, the reheater exit tube of boiler is connected with the female pipe of high temperature reheat steam, all include the high-pressure cylinder in every group steam turbine, intermediate pressure jar and low-pressure jar, all be provided with the high-pressure jar governing valve on the steam inlet of every high-pressure jar, every high-pressure jar all is connected with the female pipe of main steam through the high-pressure jar governing valve, the steam vent and the female union coupling of low temperature reheat steam of every high-pressure jar, all be provided with the intermediate pressure jar governing valve on the steam inlet on every intermediate pressure jar, every intermediate pressure jar all is connected with the female pipe of high temperature reheat steam through the intermediate pressure jar governing valve.
The main steam main pipe is also provided with a first electric gate valve, and the main steam main pipe is connected with the steam inlet of each high-pressure cylinder through the first electric gate valve and the high-pressure cylinder regulating valve in sequence.
Still be provided with check valve and second electric gate valve on the female pipe of low temperature reheat steam, the female pipe of low temperature reheat steam is connected with the steam extraction mouth of every high pressure cylinder through second electric gate valve and check valve.
And a third electric gate valve is arranged on the high-temperature reheating steam main pipe, and the high-temperature reheating steam main pipe is connected with each intermediate pressure cylinder through the third electric gate valve and the intermediate pressure cylinder regulating valve in sequence.
An operation method of a large unit peak shaving system capable of flexibly performing peak shaving operation comprises a double-stage adjustment method and a single-stage adjustment method;
according to the requirement of the power generator on the side of each turbine, under the condition of ensuring the safe operation of each turbine, the main steam quantity of the steam inlet of each high-pressure cylinder is adjusted through a high-pressure cylinder adjusting valve according to the ratio of the power generator on the side of each turbine, and the high-temperature reheat steam quantity of the steam inlet of each intermediate-pressure cylinder is adjusted through an intermediate-pressure cylinder adjusting valve at the same time, so that the ratio of the main steam quantity in the steam inlet of each high-pressure cylinder is consistent with the ratio of the power generator on the side of each turbine, and the ratio of the high-temperature reheat steam quantity in the steam inlet of each intermediate-pressure cylinder is consistent with the ratio of the power generator on the side of the turbine;
the single-stage adjusting method comprises single-stage high-pressure cylinder adjustment and single-stage intermediate-pressure cylinder adjustment;
the method for adjusting the single-stage high-pressure cylinder comprises the following steps:
the opening of the intermediate pressure cylinder regulating valve on the steam inlet of each intermediate pressure cylinder is adjusted to be consistent, and meanwhile, the main steam quantity of the steam inlet of each high pressure cylinder is regulated according to the on-line electric quantity of each turbine side generator, so that the main steam quantity in the steam inlet of each high pressure cylinder meets the on-line electric quantity requirement of the turbine side generator;
the method for adjusting the single-stage intermediate pressure cylinder comprises the following steps:
the opening degree of the high-pressure cylinder regulating valve on the steam inlet of each high-pressure cylinder is adjusted to be consistent, and meanwhile, the high-temperature reheat steam quantity of the steam inlet of each intermediate pressure cylinder is adjusted according to the internet electric quantity of each turbine side generator, so that the high-temperature reheat steam quantity in the steam inlet of each intermediate pressure cylinder meets the internet electric quantity requirement of the turbine side generator.
The invention discloses a large unit peak regulation system capable of flexibly peak regulation and an operation method thereof, which can flexibly realize load regulation of a plurality of units, control the on-line electric quantity of the units, realize the deep peak regulation of the units by less than 20 percent and obtain the peak regulation benefit by controlling the main steam inlet volume of each steam turbine and the inlet volume of high-temperature reheat steam in a two-stage regulation way or a single-stage regulation way through a main steam pipeline, a high-temperature reheat steam pipeline and a low-temperature reheat steam pipeline main pipe.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the implementations of the present invention, and not all implementations, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any inventive work are within the scope of the present invention.
As shown in fig. 1, a big unit peak shaving system that can adjust peak operation in a flexible way, including boiler 1 and at least two sets of steam turbines 9, superheater outlet 2 of boiler 1 is connected with main steam main pipe 3, reheater inlet of boiler 1 connects main pipe 13 of low temperature reheat steam, reheater outlet pipe of boiler 1 is connected with main pipe 4 of high temperature reheat steam, all include high-pressure cylinder in every steam turbine 9, intermediate pressure cylinder and low-pressure cylinder, all be provided with high-pressure cylinder governing valve 8 on the steam inlet of every high-pressure cylinder, every high-pressure cylinder all is connected with main pipe 3 of main steam through high-pressure cylinder governing valve 8, the steam outlet of every high-pressure cylinder is connected with main pipe 13 of low temperature reheat steam, all be provided with intermediate pressure cylinder governing valve 7 on the steam inlet on every intermediate pressure cylinder, every intermediate pressure cylinder all is connected with main pipe 4 of high temperature reheat steam through intermediate pressure cylinder governing valve 7.
The main steam pipe 3 is further provided with a first electric gate valve 5, and the main steam pipe 3 is connected with the steam inlet of each high-pressure cylinder through the first electric gate valve 5 and the high-pressure cylinder regulating valve 8 in sequence.
Still be provided with check valve 11 and second electric gate valve 12 on the female pipe 13 of low temperature reheat steam, female pipe 13 of low temperature reheat steam is connected with the steam extraction mouth of every high-pressure cylinder through second electric gate valve 12 and check valve 11.
And a third electric gate valve 6 is arranged on the high-temperature reheating steam main pipe 4, and the high-temperature reheating steam main pipe 4 is connected with each intermediate pressure cylinder through the third electric gate valve 6 and an intermediate pressure cylinder regulating valve 7 in sequence.
In this embodiment, a high-pressure cylinder steam inlet on each steam turbine 9 is connected with a main steam main pipe 3 through a main steam branch pipe, the main steam branch pipe and the main steam main pipe 3 are both provided with a first electric gate valve 5, the main steam branch pipe is provided with a high-pressure cylinder regulating valve 8, and the main steam main pipe 3 at the superheater outlet 2 of the boiler 1 is connected with the high-pressure cylinder steam inlets of a plurality of steam turbines through the first electric gate valves 5;
the exhaust steam of the high-pressure cylinder of each steam turbine 9 is converged on a low-temperature reheating steam main pipe 13 through a low-temperature reheating steam branch pipe, a second electric gate valve 12 is installed on the low-temperature reheating steam main pipe 13, and a check valve 11 and the second electric gate valve 12 are installed on the low-temperature reheating steam branch pipe;
the high-temperature reheat steam main pipe 4 at the outlet of the boiler reheater is connected with a steam inlet of an intermediate pressure cylinder in the multiple turbines 9 through a branch pipe, a third electric gate valve 6 is installed on the high-temperature reheat steam main pipe 4, and a third electric gate valve 6 and an intermediate pressure cylinder regulating valve 7 are installed on the branch pipe.
A high pressure regulating valve 8 on each turbine 9 can regulate the amount of steam entering the high pressure cylinder and a medium pressure regulating valve 7 on each turbine 9 can regulate the amount of steam entering the medium pressure cylinder.
The high pressure cylinder, the intermediate pressure cylinder and the low pressure cylinder are all components of the steam turbine 9, and steam sequentially passes through the high pressure cylinder, the intermediate pressure cylinder and the low pressure cylinder of the steam turbine to do work.
The working process of the large unit peak shaving system capable of flexibly performing peak shaving operation comprises the following steps:
main steam generated by the boiler passes through a main steam main pipe 3, sequentially passes through a first electric gate valve 5 and a high-pressure cylinder regulating valve 8, enters different high-pressure cylinders, is exhausted after acting in each high-pressure cylinder, is converged on a low-temperature reheat steam main pipe 13 through a low-temperature reheat steam branch pipe of each steam turbine 9, then enters a reheater of the boiler 1 for heating, passes through a high-temperature reheat steam main pipe 4, sequentially passes through a third electric gate valve 6 and a medium-pressure cylinder regulating valve 7, enters an intermediate pressure cylinder of each steam turbine 9, is exhausted out of the intermediate pressure cylinder after acting in each intermediate pressure cylinder, is exhausted into a low-pressure cylinder through an intermediate-pressure communicating pipe, is exhausted to a condenser through an exhaust device after acting in the low-pressure cylinder, condensed water of each steam turbine is sequentially heated by the high-pressure cylinder and the intermediate-pressure cylinder regenerative steam extraction pipeline and then is converged in a main water supply main pipe 14, and then the coal is removed from a boiler economizer to complete the circulation.
A method for operating a large unit peak shaving system capable of flexibly performing peak shaving operation comprises a double-stage adjusting method and a single-stage adjusting method;
according to the requirement of the power supply on the grid of the generator 10 at each steam turbine 9 side, under the condition that the safe operation of each steam turbine 9 is ensured, the main steam quantity of the steam inlet of each high-pressure cylinder is adjusted through the high-pressure cylinder adjusting valve 8 according to the ratio of the power supply on the grid of the generator 10 at each steam turbine 9 side, and the high-temperature reheat steam quantity of the steam inlet of each intermediate-pressure cylinder is adjusted through the intermediate-pressure cylinder adjusting valve 7, so that the ratio of the main steam quantity in the steam inlet of each high-pressure cylinder is consistent with the ratio of the power supply on the grid of the generator 10 at each steam turbine 9 side, and the ratio of the high-temperature reheat steam quantity in the steam inlet of each intermediate-pressure cylinder is consistent with the ratio of the power supply on the generator 10 at each steam turbine 9 side;
the single-stage adjusting method comprises single-stage high-pressure cylinder adjustment and single-stage intermediate-pressure cylinder adjustment;
the method for adjusting the single-stage high-pressure cylinder comprises the following steps:
the opening of the intermediate pressure cylinder regulating valve 7 on the steam inlet of each intermediate pressure cylinder is adjusted to be consistent, and meanwhile, the main steam quantity of the steam inlet of each high pressure cylinder is regulated according to the power on the grid of the generator 10 on the steam turbine 9 side, so that the main steam quantity in the steam inlet of each high pressure cylinder meets the power on the grid of the generator 10 on the steam turbine 9 side;
the method for adjusting the single-stage intermediate pressure cylinder comprises the following steps:
the opening of the high-pressure cylinder regulating valve 8 on the steam inlet of each high-pressure cylinder is adjusted to be consistent, and meanwhile, the high-temperature reheat steam quantity of the steam inlet of each intermediate-pressure cylinder is regulated according to the power supply capacity of the generator 10 on the steam turbine 9 side, so that the high-temperature reheat steam quantity in the steam inlet of each intermediate-pressure cylinder meets the power supply capacity requirement of the generator 10 on the steam turbine 9 side.
As shown in fig. 1, two sets of turbines 9, which are respectively marked as a set a and a set B, are used in this embodiment;
the specific operating procedure for the two-stage regulation method is as follows:
according to the requirement of the power on the power supply of the power generator on the side of the steam turbine A, B, under the condition of ensuring the safe operation of the steam turbine set, the steam inlet amount entering the steam turbine A, B side is adjusted according to the ratio of the power on the power generator on the side of the steam turbine A, B, namely the main steam amount of the steam inlet of each high-pressure cylinder is adjusted through the high-pressure cylinder adjusting valve 8, and the high-temperature reheat steam amount of the steam inlet of each intermediate-pressure cylinder is adjusted through the intermediate-pressure cylinder adjusting valve 7, so that the ratio of the main steam amount in the steam inlet of each high-pressure cylinder is consistent with the ratio of the power on the power supply of the power generator 10 on the side of each steam turbine 9, and the ratio of the high-temperature reheat steam amount in the steam inlet of each intermediate-pressure cylinder is consistent with the ratio of the power on the power supply of the power generator 10 on the side of the steam turbine 9; therefore, the grid electricity quantity of the generator on the side of the steam turbine A, B is adjusted through double-stage adjustment.
The main steam generated by the boiler is adjusted to the steam inlet amount of each main steam branch pipe of the steam turbine according to the ratio of the on-grid electricity quantity of the power generator at the side of the steam turbine A, B through the main steam main pipe 3, each main steam enters each high pressure cylinder after passing through the first electric gate valve 5 and the high pressure cylinder adjusting valve 8, the main steam is exhausted after acting in each high pressure cylinder, each low-temperature reheat steam branch pipe of the steam turbine is converged at the low-temperature reheat steam main pipe 13, then the high-temperature reheated steam enters a boiler reheater to be heated, the steam inlet quantity of each high-temperature reheated steam branch pipe of the steam turbine is adjusted through a high-temperature reheated steam main pipe 4 according to the ratio of the on-grid electricity quantity of a generator on the A, B side of the steam turbine, the high-temperature reheated steam of each steam turbine enters a respective intermediate pressure cylinder through a third electric gate valve 6 and an intermediate pressure cylinder adjusting valve 7, and the high-temperature reheated steam does work in the intermediate pressure cylinder and then enters a respective low pressure cylinder through a respective intermediate and low pressure communicating pipe butterfly valve;
steam is exhausted to respective condensers through an exhaust device after being processed in respective low-pressure cylinders, condensed water of each steam turbine is heated by a high-pressure cylinder and a medium-pressure cylinder in sequence through a regenerative steam extraction pipeline and then is converged in a main water supply main pipe 14, and then the condensed water is removed from a boiler economizer to complete circulation.
Load adjustment of multiple sets can be flexibly realized by controlling the main steam and high-temperature reheat steam amount of a single set in a double-stage mode, the online electric quantity of the set is controlled, deep peak regulation of the single steam turbine set is realized by less than 20%, peak regulation income is obtained, and the double-stage control method has high value.
The double-stage regulation method is not limited to the requirement of the power supply on the power generator at the side of the steam turbine A, B, and the steam inlet quantities of the main steam branch pipes and the reheat steam branch pipes corresponding to the steam inlets of the high-pressure cylinder and the intermediate-pressure cylinder of the steam turbine A, B are regulated according to the specific ratio under the condition of ensuring the safe operation of the steam turbine set, and the steam regulation of the high-pressure cylinder and the intermediate-pressure cylinder of the steam turbine A, B with different specific ratios is also within the scope of the invention.
For example, the steam inlet amount of the main steam branch corresponding to the high-pressure cylinder of the steam turbine a is higher than the steam inlet amount of the main steam branch corresponding to the high-pressure cylinder of the steam turbine B, and the steam inlet amount of the high-temperature reheating steam branch corresponding to the intermediate-pressure cylinder of the steam turbine B is higher than the steam inlet amount of the high-temperature reheating steam branch corresponding to the intermediate-pressure cylinder of the steam turbine a, and such a two-stage adjustment mode is also within the scope of the present invention.
That is, no matter what ratio of the steam inlet amount of each main steam branch pipe and the reheat steam branch pipe corresponding to the steam inlets of the high pressure cylinder and the intermediate pressure cylinder of the steam turbine A, B is, the two-stage regulation mode is within the scope of the present invention.
The specific operation process of the single-stage high-pressure cylinder is as follows:
according to the requirement of the power supply on the power generator on the steam turbine A, B side, only the steam flow of each main steam branch pipe corresponding to the steam inlet of the high-pressure cylinder of the steam turbine A, B is adjusted under the condition of ensuring the safe operation of the steam turbine set, the steam inlet of the intermediate pressure cylinder on the steam turbine A, B side is not adjusted, and the steam inlet valve openings of the intermediate pressure cylinders are kept consistent, so that the power supply on the power generator on the steam turbine A, B side is adjusted in a single stage.
Main steam generated by a boiler is adjusted to enter steam inlet amount of each main steam branch pipe of the steam turbine according to the online electric quantity of a generator on the A, B side of the steam turbine through a main steam main pipe 3, each main steam enters each high-pressure cylinder after passing through a first electric gate valve 5 and a high-pressure cylinder adjusting valve 8 in sequence, the main steam does work in each high-pressure cylinder and is discharged, low-temperature reheat steam branch pipes of each steam turbine are combined in a low-temperature reheat steam main pipe 13 and then enter a boiler reheater to be heated, high-temperature reheat steam amount of each branch pipe is not adjusted any more after passing through a high-temperature reheat steam main pipe 4, and the steam is equally divided and then enters each intermediate pressure cylinder through a third electric gate valve 6 and a medium-pressure cylinder adjusting valve 7 on each branch pipe;
high-temperature reheated steam works in the intermediate pressure cylinder and then enters each group of low-pressure cylinders through respective intermediate and low-pressure communicating pipe butterfly valves, the steam works in each group of low-pressure cylinders and then is exhausted to respective condensers through an exhaust device, condensed water of each steam turbine is heated by the high-pressure cylinder and the intermediate pressure cylinder in sequence and then is converged in the main water supply main pipe 14, and then the condensed water is removed from a boiler economizer to complete circulation.
The specific operation process of the single-stage intermediate pressure cylinder is as follows:
according to the requirement of the power supply on the power generator on the steam turbine A, B side, only the steam flow of each high-temperature reheat steam branch pipe corresponding to the steam inlet of the medium-pressure cylinder in the steam turbine A, B is adjusted under the condition of ensuring the safe operation of the steam turbine set, the steam inlet of the main steam of the high-pressure cylinder on the steam turbine A, B side is not adjusted any more, and the valve opening of each high-pressure cylinder adjusting valve 8 is kept consistent, so that the power supply on the power generator on the steam turbine A, B side is adjusted in a single stage.
Main steam generated by the boiler passes through a main steam main pipe 3, and because the steam quantity on each main steam branch pipe is not regulated any more, the main steam is equally divided and then enters respective high-pressure cylinders through a first electric gate valve 5 and a high-pressure cylinder regulating valve 8, the main steam does work in the respective high-pressure cylinders and then joins a low-temperature reheating steam main pipe 13 through respective steam turbine low-temperature reheating steam branch pipes, and then enters a boiler reheater for heating;
after the boiler reheater is heated, steam passes through the high-temperature reheated steam main pipe 4, the steam quantity of each high-temperature reheated steam branch pipe on the steam turbine A, B side is adjusted through the intermediate pressure cylinder adjusting valve 7, each high-temperature reheated steam branch pipe enters each intermediate pressure cylinder through the third electric gate valve 6 and the intermediate pressure cylinder adjusting valve 7, the high-temperature reheated steam does work in each intermediate pressure cylinder, then enters the low pressure cylinder through each intermediate pressure communicating pipe butterfly valve, the steam is exhausted to each condenser through the steam exhaust device after the work is done in the low pressure cylinder, each steam turbine condensate water is heated by the high pressure cylinder and the intermediate pressure cylinder reheated steam extraction pipeline in sequence and then is converged in the main water supply main pipe 14, and then the boiler economizer is removed to complete the circulation.
The invention has reasonable structure, is simple and convenient, can flexibly realize the load adjustment of a plurality of units by controlling the high-temperature reheat steam quantity of each unit in a single stage, controls the on-grid electricity quantity of the units, realizes the deep peak regulation of a single steam turbine unit by less than 20 percent, obtains the peak regulation benefit and has higher value.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (5)
1. The utility model provides a big unit peak shaving system that can nimble peak shaving operation which characterized in that: comprises a boiler (1) and at least two groups of steam turbines (9), wherein a superheater outlet (2) of the boiler (1) is connected with a main steam main pipe (3), a reheater inlet of the boiler (1) is connected with a low-temperature reheated steam main pipe (13), the reheater outlet pipe of boiler (1) is connected with high-temperature reheat steam female pipe (4), all include the high-pressure cylinder in every group steam turbine (9), intermediate pressure jar and low-pressure jar, all be provided with high-pressure jar governing valve (8) on the steam inlet of every high-pressure jar, every high-pressure jar all is connected with main steam female pipe (3) through high-pressure jar governing valve (8), the steam vent and the female pipe of low temperature reheat steam (13) of every high-pressure jar are connected, all be provided with intermediate pressure jar governing valve (7) on the steam inlet on every intermediate pressure jar, every intermediate pressure jar all is connected with high temperature reheat steam female pipe (4) through intermediate pressure jar governing valve (7).
2. The large unit peak shaving system capable of flexibly performing peak shaving operation according to claim 1, wherein: the main steam main pipe (3) is further provided with a first electric gate valve (5), and the main steam main pipe (3) is connected with a steam inlet of each high-pressure cylinder through the first electric gate valve (5) and the high-pressure cylinder regulating valve (8) in sequence.
3. The large unit peak shaving system capable of flexibly performing peak shaving operation according to claim 1, wherein: still be provided with check valve (11) and second electric gate valve (12) on low temperature reheat steam main pipe (13), low temperature reheat steam main pipe (13) are connected with the steam extraction mouth of every high-pressure cylinder through second electric gate valve (12) and check valve (11).
4. The large unit peak shaving system capable of flexibly performing peak shaving operation according to claim 1, wherein: be provided with third electric gate valve (6) on high temperature reheat steam main pipe (4), high temperature reheat steam main pipe (4) loop through third electric gate valve (6) and intermediate pressure jar governing valve (7) and are connected with every intermediate pressure jar.
5. A method of operating a peak shaving system for large units with flexible peak shaving operation according to any one of claims 1 to 4, characterized by: including a two-stage regulation method and a single-stage regulation method;
according to the requirement of the power on the grid of the generator (10) on each steam turbine (9), under the condition that the safe operation of each steam turbine (9) is ensured, according to the ratio of the power on the grid of the generator (10) on each steam turbine (9), the main steam quantity of the steam inlet of each high-pressure cylinder is adjusted through a high-pressure cylinder adjusting valve (8), and meanwhile, the high-temperature reheat steam quantity of the steam inlet of each intermediate-pressure cylinder is adjusted through an intermediate-pressure cylinder adjusting valve (7), so that the ratio of the main steam quantity in the steam inlet of each high-pressure cylinder is consistent with the ratio of the power on the grid of the generator (10) on each steam turbine (9), and the ratio of the high-temperature reheat steam quantity in the steam inlet of each intermediate-pressure cylinder is consistent with the ratio of the power on the grid of the generator (10) on each steam turbine (9);
the single-stage adjusting method comprises single-stage high-pressure cylinder adjustment and single-stage intermediate-pressure cylinder adjustment;
the method for adjusting the single-stage high-pressure cylinder comprises the following steps:
the opening of a medium pressure cylinder regulating valve (7) on the steam inlet of each medium pressure cylinder is adjusted to be consistent, and meanwhile, the main steam quantity of the steam inlet of each high pressure cylinder is regulated according to the power on the power of a generator (10) on the steam turbine (9) side, so that the main steam quantity in the steam inlet of each high pressure cylinder meets the power on the power requirement of the generator (10) on the steam turbine (9) side;
the method for adjusting the single-stage intermediate pressure cylinder comprises the following steps:
the opening of a high-pressure cylinder regulating valve (8) on the steam inlet of each high-pressure cylinder is adjusted to be consistent, and meanwhile, the high-temperature reheat steam quantity of the steam inlet of each intermediate pressure cylinder is regulated according to the on-line electricity quantity of a generator (10) on the steam turbine (9) side, so that the high-temperature reheat steam quantity in the steam inlet of each intermediate pressure cylinder meets the on-line electricity quantity requirement of the generator (10) on the steam turbine (9) side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210589438.2A CN115013097A (en) | 2022-05-27 | 2022-05-27 | Large unit peak shaving system capable of flexibly performing peak shaving operation and operation mode |
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| CN202210589438.2A CN115013097A (en) | 2022-05-27 | 2022-05-27 | Large unit peak shaving system capable of flexibly performing peak shaving operation and operation mode |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005741A (en) * | 2017-12-14 | 2018-05-08 | 华电电力科学研究院 | It is a kind of to improve the solidifying back of the body of taking out for thermally safe co-generation unit and adjusting method |
| CN110388637A (en) * | 2019-07-01 | 2019-10-29 | 上海发电设备成套设计研究院有限责任公司 | A kind of energy-saving type boiler ultra-low load steady combustion system |
| CN110566295A (en) * | 2019-07-27 | 2019-12-13 | 华电电力科学研究院有限公司 | Double-unit coupling peak shaving method and device based on power plant electricity and heat load cooperative scheduling |
| CN110578565A (en) * | 2019-08-23 | 2019-12-17 | 广西电网有限责任公司电力科学研究院 | system and method for coordinated peak regulation and heat supply of distributed combined cycle generator set |
| CN210738628U (en) * | 2019-08-23 | 2020-06-12 | 广西电网有限责任公司电力科学研究院 | System for distributed combined cycle generator set collaborates power peak regulation and heat supply |
| CN111852595A (en) * | 2020-08-11 | 2020-10-30 | 西安热工研究院有限公司 | Efficient thermal power plant deep peak regulation system and method |
| CN113175367A (en) * | 2021-04-25 | 2021-07-27 | 西安热工研究院有限公司 | Master control system for improving peak regulation capacity and flexibility of unit and operation method |
| CN113431651A (en) * | 2021-06-29 | 2021-09-24 | 西安热工研究院有限公司 | Low-load operation system with one furnace and two machines |
| CN114458405A (en) * | 2021-11-15 | 2022-05-10 | 国家能源集团科学技术研究院有限公司 | Multi-unit cooperative steam power generation system |
-
2022
- 2022-05-27 CN CN202210589438.2A patent/CN115013097A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005741A (en) * | 2017-12-14 | 2018-05-08 | 华电电力科学研究院 | It is a kind of to improve the solidifying back of the body of taking out for thermally safe co-generation unit and adjusting method |
| CN110388637A (en) * | 2019-07-01 | 2019-10-29 | 上海发电设备成套设计研究院有限责任公司 | A kind of energy-saving type boiler ultra-low load steady combustion system |
| CN110566295A (en) * | 2019-07-27 | 2019-12-13 | 华电电力科学研究院有限公司 | Double-unit coupling peak shaving method and device based on power plant electricity and heat load cooperative scheduling |
| CN110578565A (en) * | 2019-08-23 | 2019-12-17 | 广西电网有限责任公司电力科学研究院 | system and method for coordinated peak regulation and heat supply of distributed combined cycle generator set |
| CN210738628U (en) * | 2019-08-23 | 2020-06-12 | 广西电网有限责任公司电力科学研究院 | System for distributed combined cycle generator set collaborates power peak regulation and heat supply |
| CN111852595A (en) * | 2020-08-11 | 2020-10-30 | 西安热工研究院有限公司 | Efficient thermal power plant deep peak regulation system and method |
| CN113175367A (en) * | 2021-04-25 | 2021-07-27 | 西安热工研究院有限公司 | Master control system for improving peak regulation capacity and flexibility of unit and operation method |
| CN113431651A (en) * | 2021-06-29 | 2021-09-24 | 西安热工研究院有限公司 | Low-load operation system with one furnace and two machines |
| CN114458405A (en) * | 2021-11-15 | 2022-05-10 | 国家能源集团科学技术研究院有限公司 | Multi-unit cooperative steam power generation system |
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